Great work! My only complaint is that some areas might be a bit too rocky? But I'm not sure. Also, the red grass (it's not heather, just called that in the CK) was something I experimented with. It will eventually get a complete retexture.

Me and Lasur decided we wanted one main Legion fort per County. Most of these forts would be repurposed old forts, because it's cheaper. Fort Istirus was repurposed like this and renamed to Fort Rislav, after Rislav Larich, the First Era king of Skingrad.

Colovia is the Gold Coast, West Weald, Colovian Highlands and Great Forest combined. So I'd say Colovia is about 1/3 complete. This particular claim is in the Colovian Highlands, which is getting close to being 1/2 complete, I think.

Nice! You should lower the terrain under the ruined tower with the stairs, so you have this little underground room. Also, the ground textures and the trees used are wrong. The ground textures should be the CYRLHighland set and the trees should be BSKTreeScotsPine. So replace/delete the current trees and paint over the ground textures.

Thanks for the suggestions! http://www.xeno-canto.org/ has a huge library of bird recordings. They are all licensed under Creative Commons, meaning you're free to do whatever you want with them, as long as it's non-commerical and you give proper credit. This is what I've been using for other regions.